EP3456347B1 - Novel peptides and combination of peptides for use in immunotherapy against various tumors - Google Patents
Novel peptides and combination of peptides for use in immunotherapy against various tumors Download PDFInfo
- Publication number
- EP3456347B1 EP3456347B1 EP18201235.1A EP18201235A EP3456347B1 EP 3456347 B1 EP3456347 B1 EP 3456347B1 EP 18201235 A EP18201235 A EP 18201235A EP 3456347 B1 EP3456347 B1 EP 3456347B1
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- peptide
- cancer
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- peptides
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Definitions
- the present invention relates to the field of peptides, proteins, nucleic acids and cells for use in immunotherapeutic methods. Therefore, the present invention relates to the field of immunotherapy of cancer.
- the present invention furthermore generally relates to tumor-associated T-cell peptide epitopes, alone or in combination with other tumor-associated peptides that can for example serve as active pharmaceutical ingredients of vaccine compositions that stimulate anti-tumor immune responses, or to stimulate T cells ex vivo and transfer into patients.
- Peptides bound to molecules of the major histocompatibility complex (MHC), or peptides as such can also be targets of antibodies, soluble T-cell receptors, and other binding molecules.
- MHC major histocompatibility complex
- GB is the most common central nervous system malignancy with an age-adjusted incidence rate of 3.19 per 100,000 inhabitants within the United States. GB has a very poor prognosis with a 1-year survival rate of 35% and a 5-year survival rate lower than 5%. Male gender, older age and ethnicity appear to be risk factors for GB (Thakkar et al., 2014).
- CLL is the most common leukemia in the Western world where it comprises about one third of all leukemias. Incidence rates are similar in the US and Europe, and estimated new cases are about 16,000 per year. CLL is more common in Caucasians than in Africans, rarer in Hispanics and Native Americans and seldom in Asians. In people of Asian origin, CLL incidence rates are 3 fold lower than in Caucasians (Gunawardana et al., 2008). The five-year overall survival for patients with CLL is about 79% (http://www.cancer.net/cancer-types/leukemia-chronic-lymphocytic-cll/statistics).
- Lung cancer is the most common type of cancer worldwide and the leading cause of death from cancer in many countries. Lung cancer is subdivided into small cell lung cancer and non-small cell lung cancer. NSCLC includes the histological types adenocarcinoma, squamous cell carcinoma and large cell carcinoma and accounts for 85% of all lung cancers in the United States. The incidence of NSCLC is closely correlated with smoking prevalence, including current and former smokers and the five year survival rate was reported to be 15% (World Cancer Report, 2014; Molina et al., 2008).
- the standard treatment for breast cancer patients depends on different parameters: tumor stage, hormone receptor status and HER2 expression pattern.
- the standard of care includes complete surgical resection of the tumor followed by radiation therapy.
- Chemotherapy with mainly anthracyclines and taxanes may be started prior to or after resection.
- Patients with HER2-positive tumors receive the anti-HER2 antibody trastuzumab in addition to the chemotherapeutics (S3-Leitline Mammakarzinom, 2012).
- Breast cancer is an immunogenic cancer entity and different types of infiltrating immune cells in primary tumors exhibit distinct prognostic and predictive significance.
- a large number of early phase immunotherapy trials have been conducted in breast cancer patients.
- Clinical data on the effects of immune checkpoint modulation with ipilimumab and other T cell-activating antibodies in breast cancer patients are emerging (Emens, 2012).
- CLL is not curable at present, many patients show only slow progression of the disease or worsening of symptoms.
- treatment options include chemotherapy, targeted therapy, immune-based therapies like monoclonal antibodies, chimeric antigen-receptors (CARs) and active immunotherapy, and stem cell transplants.
- CARs chimeric antigen-receptors
- CAR engineered autologous chimeric antigen receptor
- Active immunotherapy includes the following strategies: gene therapy, whole modified tumor cell vaccines, DC-based vaccines and tumor associated antigen (TAA)-derived peptide vaccines.
- TAA tumor associated antigen
- TAAs are over-expressed in CLL and are suitable for vaccinations. These include fibromodulin (Mayr et al., 2005), RHAMM/CD168 (Giannopoulos et al., 2006), MDM2 (Mayr et al., 2006), hTERT (Counter et al., 1995), the oncofetal antigen-immature laminin receptor protein(OFAiLRP) (Siegel et al., 2003), adipophilin (Schmidt et al., 2004), survivin (Granziero et al., 2001), KW1 to KW14 (Krackhardt et al., 2002) and the tumor-derived IgVHCDR3 region (Harig et al., 2001; Carballido et al., 2012).
- a phase I clinical trial was conducted using the RHAMM-derived R3 peptide as a vaccine. 5 of 6 patients had detectable R3-specific CD8+ T-cell responses
- CRC colorectal cancer
- TAAs tumor-associated antigens
- DC dendritic cell
- Peptide vaccines have so far been directed against carcinoembryonic antigen (CEA), mucin 1, EGFR, squamous cell carcinoma antigen recognized by T cells 3 (SART3), beta-human chorionic gonadotropin (beta-hCG), Wilms' Tumor antigen 1 (WT1), Survivin-2B, MAGE3, p53, ring finger protein 43 and translocase of the outer mitochondrial membrane 34 (TOMM34), or mutated KRAS.
- CEA carcinoembryonic antigen
- mucin 1 mucin 1
- EGFR squamous cell carcinoma antigen recognized by T cells 3
- beta-hCG beta-human chorionic gonadotropin
- WT1 Wilms' Tumor antigen 1
- Survivin-2B MAGE3, p53
- TOMM34 translocase of the outer mitochondrial membrane 34
- KRAS translocase of the outer mitochondrial membrane 34
- Dendritic cell vaccines comprise DCs pulsed with either TAA-derived peptides, tumor cell lysates, apoptotic tumor cells, or tumor RNA or DC-tumor cell fusion products. While many patients in phase I/II trials showed specific immunological responses, only the minority had a clinical benefit (Koido et al., 2013).
- TTK protein kinase TGF protein kinase
- IGF insulin-like growth factor-II mRNA binding protein 3
- Intra-tumoral injection of activated T cells after in vitro challenge with autologous malignant cells elicited complete or partial tumor responses in four of eleven patients in a phase I/II study (Toomey et al., 2013).
- Gastric cancer begins in the cells lining the mucosal layer and spreads through the outer layers as it grows.
- Treatment for gastric cancer may involve endoscopic or surgical resection, chemotherapy, radiation therapy or chemoradiation (Leitline Magenkarzinom, 2012).
- Immunotherapy might be an alternative approach to ameliorate the survival of GC patients.
- Adoptive transfer of tumor-associated lymphocytes and cytokine induced killer cells, peptide-based vaccines targeting HER2/neu, MAGE-3 or vascular endothelial growth factor receptor 1 and 2 and dendritic cell-based vaccines targeting HER2/neu showed promising results in clinical GC trials.
- Immune checkpoint inhibition and engineered T cells might represent additional therapeutic options, which is currently evaluated in pre-clinical and clinical studies (Matsueda and Graham, 2014).
- glioblastoma WHO grade IV
- Different immunotherapeutic approaches are investigated for the treatment of GB, including immune-checkpoint inhibition, vaccination and adoptive transfer of engineered T cells.
- peptide-based vaccines including heat-shock protein vaccines, autologous tumor cell vaccines, dendritic cell-based vaccines and viral protein-based vaccines.
- peptides derived from GB-associated proteins like epidermal growth factor receptor variant III (EGFRvlll) or heat shock proteins or dendritic cells pulsed with autologous tumor cell lysate or cytomegalo virus components are applied to induce an anti-tumor immune response in GB patients.
- EGFRvlll epidermal growth factor receptor variant III
- heat shock proteins or dendritic cells pulsed with autologous tumor cell lysate or cytomegalo virus components are applied to induce an anti-tumor immune response in GB patients.
- Adoptive transfer of genetically modified T cells is an additional immunotherapeutic approach for the treatment of GB.
- Different clinical trials currently evaluate the safety and efficacy of chimeric antigen receptor bearing T cells directed against HER2, IL-13 receptor alpha 2 and EGFRvIII (Ampie et al., 2015).
- Cytokines have been used to activate subsets of immune cells and/or increase the tumor immunogenicity (Reinisch et al., 2002; Sangro et al., 2004). Other trials have focused on the infusion of Tumor-infiltrating lymphocytes or activated peripheral blood lymphocytes (Shi et al., 2004; Takayama et al., 1991; Takayama et al., 2000).
- the standard therapy in melanoma is complete surgical resection with surrounding healthy tissue
- Therapeutic options include monochemotherapy, polychemotherapy and targeted therapies with specific inhibitors (S3-Leitline Melanom, 2013).
- Adoptive T cell transfer shows great promise for the treatment of advanced stage melanoma.
- T cells with high affinity T cell receptors for the melanocyte specific antigens MART1 and gp100 and the cancer-testis antigen MAGEA3 induced considerable toxic effects in clinical trials.
- adoptive T cell transfer has high therapeutic potential, but safety and tolerability of these treatments needs to be further increased (Phan and Rosenberg, 2013; Hinrichs and Restifo, 2013).
- Intrinsic anti-tumor immunity as well as immunotherapy are hampered by an immunosuppressive tumor microenvironment.
- immunomodulatory drugs like cyclophosphamide, anti-CD25 antibodies and pegylated liposomal doxorubicin are tested in combination with immunotherapy.
- Most reliable data are currently available for ipilimumab, an anti-CTLA4 antibody, which enhances T cell activity. Ipilimumab was shown to exert significant anti-tumor effects in ovarian cancer patients (Mantia-Smaldone et al., 2012).
- Vaccination strategies are investigated as further innovative and promising alternative for the treatment of pancreatic cancer.
- Peptide-based vaccines targeting KRAS mutations, reactive telomerase, gastrin, survivin, CEA and MUC1 have already been evaluated in clinical trials, partially with promising results.
- clinical trials for dendritic cell-based vaccines, allogeneic GM-CSF-secreting vaccines and algenpantucel-L in pancreatic cancer patients also revealed beneficial effects of immunotherapy. Additional clinical trials further investigating the efficiency of different vaccination protocols are currently ongoing (Salman et al., 2013).
- the therapeutic strategy for prostate cancer mainly depends on the cancer stage.
- treatment options include active surveillance (wait and watch), complete surgical resection of the prostate and local high dose radiation therapy with or without brachytherapy (S3-Leitline Prostatakarzinom, 2014).
- the dendritic cell-based vaccine sipuleucel-T was the first anti-cancer vaccine to be approved by the FDA. Due to its positive effect on survival in patients with CRPC, much effort is put into the development of further immunotherapies. Regarding vaccination strategies, the peptide vaccine prostate-specific antigen (PSA)-TRICOM, the personalized peptide vaccine PPV, the DNA vaccine pTVG-HP and the whole cell vaccine expressing GM-CSF GVAX showed promising results in different clinical trials. Furthermore, dendritic cell-based vaccines other than sipuleucel-T, namely BPX-101 and DCVAC/Pa were shown to elicited clinical responses in prostate cancer patients.
- Immune checkpoint inhibitors like ipilimumab and nivolumab are currently evaluated in clinical studies as monotherapy as well as in combination with other treatments, including androgen deprivation therapy, local radiation therapy, PSA-TRICOM and GVAX.
- the immunomodulatory substance tasquinimod which significantly slowed progression and increased progression free survival in a phase II trial, is currently further investigated in a phase III trial.
- Lenalidomide another immunomodulator, induced promising effects in early phase clinical studies, but failed to improve survival in a phase III trial. Despite these disappointing results further lenalidomide trials are ongoing (Quinn et al., 2015).
- TKIs sorafenib, pazopanib or recently axitinib are recommended as second-line therapy in RCC patients who have failed prior therapy with cytokines (IFN- ⁇ , IL-2).
- the NCCN guidelines advise also sunitinib in this setting (high-level evidence according to NCCN Category I).
- the present invention further relates to a nucleic acid, encoding for a peptide according to the invention or for a TCR according to the invention, or an antibody according to the invention, optionally linked to a heterologous promoter sequence, or an expression vector expressing said nucleic acid.
- the one or more adjuvants are selected from interleukin and immunoadjuvant.
- the present invention further relates to the peptide according to the present invention wherein said peptide consists of an amino acid sequence according to SEQ ID NO: 14.
- the present invention further relates to the peptide according to the present invention, a nucleic acid according to the present invention or an expression vector according to the present invention for use in the treatment of diseases and in medicine, in particular in the treatment of cancer.
- the present invention further relates to antibodies that are specific against the peptide according to the present invention or complexes of said peptide according to the present invention with MHC, and methods of making these.
- the present invention further relates to a method for producing the peptide according to the present invention, said method comprising culturing the host cell according to the present invention, and isolating the peptide from said host cell or its culture medium.
- said medicament is suitable and used for a cellular therapy, a vaccine or a protein based on a soluble TCR or antibody.
- the present invention further relates to biomarkers based on the peptide according to the present invention, herein called "targets” that can be used in the diagnosis of cancer, preferably HCC, CRC, GB, GC, esophageal cancer, NSCLC, PC, RCC, BPH/PCA, OC, MCC, melanoma, breast cancer, SCLC, NHL, AML, GBC, CCC, UBC, UEC, and CLL.
- the marker can be either over-presentation of the peptide(s) themselves, or over-expression of the corresponding gene(s).
- the markers may also be used to predict the probability of success of a treatment, preferably an immunotherapy, and most preferred an immunotherapy targeting the same target that is identified by the biomarker.
- an antibody or soluble TCR can be used to stain sections of the tumor to detect the presence of a peptide of interest in complex with MHC.
- the antibody carries a further effector function such as an immune stimulating domain or toxin.
- the present invention also relates to the use of these novel targets in the context of cancer treatment.
- Stimulation of an immune response is dependent upon the presence of antigens recognized as foreign by the host immune system.
- the discovery of the existence of tumor associated antigens has raised the possibility of using a host's immune system to intervene in tumor growth.
- Various mechanisms of harnessing both the humoral and cellular arms of the immune system are currently being explored for cancer immunotherapy.
- T-cell response means the specific proliferation and activation of effector functions induced by a peptide in vitro or in vivo.
- effector functions may be lysis of peptide-pulsed, peptide-precursor pulsed or naturally peptide-presenting target cells, secretion of cytokines, preferably Interferon-gamma, TNF-alpha, or IL-2 induced by peptide, secretion of effector molecules, preferably granzymes or perforins induced by peptide, or degranulation.
- peptide shall also include “oligopeptide”.
- oligopeptide is used herein to designate a series of amino acid residues, connected one to the other typically by peptide bonds between the alpha-amino and carbonyl groups of the adjacent amino acids.
- the length of the oligopeptide is not critical to the invention, as long as the correct epitope or epitopes are maintained therein.
- the oligopeptides are typically less than about 30 amino acid residues in length, and greater than about 15 amino acids in length.
- polypeptide designates a series of amino acid residues, connected one to the other typically by peptide bonds between the alpha-amino and carbonyl groups of the adjacent amino acids.
- the length of the polypeptide is not critical to the invention as long as the correct epitopes are maintained.
- polypeptide is meant to refer to molecules containing more than about 30 amino acid residues.
- a peptide, oligopeptide, protein or polynucleotide coding for such a molecule is "immunogenic” (and thus is an "immunogen" within the present invention), if it is capable of inducing an immune response.
- immunogenicity is more specifically defined as the ability to induce a T-cell response.
- an "immunogen” would be a molecule that is capable of inducing an immune response, and in the case of the present invention, a molecule capable of inducing a T-cell response.
- the immunogen can be the peptide, the complex of the peptide with MHC, oligopeptide, and/or protein that is used to raise specific antibodies or TCRs against it.
- a class I T cell "epitope" requires a short peptide that is bound to a class I MHC receptor, forming a ternary complex (MHC class I alpha chain, beta-2-microglobulin, and peptide) that can be recognized by a T cell bearing a matching T-cell receptor binding to the MHC/peptide complex with appropriate affinity.
- Peptides binding to MHC class I molecules are typically 8-14 amino acids in length, and most typically 9 amino acids in length.
- HLA-molecules of the human are also designated human leukocyte antigens (HLA)): HLA-A, HLA-B, and HLA-C.
- HLA-A*01, HLA-A*02, and HLA-B*07 are examples of different MHC class I alleles that can be expressed from these loci.
- the peptide of the invention preferably when included into a vaccine as described herein binds to A*02.
- a vaccine may also include pan-binding MHC class II peptides. Therefore, the vaccine can be used to treat cancer in patients that are A*02 positive, whereas no selection for MHC class II allotypes is necessary due to the pan-binding nature of these peptides.
- nucleotide sequence coding for a particular peptide, oligopeptide, or polypeptide may be naturally occurring or they may be synthetically constructed.
- DNA segments encoding the peptides, polypeptides, and proteins of this invention are assembled from cDNA fragments and short oligonucleotide linkers, or from a series of oligonucleotides, to provide a synthetic gene that is capable of being expressed in a recombinant transcriptional unit comprising regulatory elements derived from a microbial or viral operon.
- a nucleotide coding for (or encoding) a peptide refers to a nucleotide sequence coding for the peptide including artificial (man-made) start and stop codons compatible for the biological system the sequence is to be expressed by, for example, a dendritic cell or another cell system useful for the production of TCRs.
- nucleic acid sequence includes both single stranded and double stranded nucleic acid.
- specific sequence refers to the single strand DNA of such sequence, the duplex of such sequence with its complement (double stranded DNA) and the complement of such sequence.
- coding region refers to that portion of a gene which either naturally or normally codes for the expression product of that gene in its natural genomic environment, i.e., the region coding in vivo for the native expression product of the gene.
- expression product means the polypeptide or protein that is the natural translation product of the gene and any nucleic acid sequence coding equivalents resulting from genetic code degeneracy and thus coding for the same amino acid(s).
- promoter means a region of DNA involved in binding of RNA polymerase to initiate transcription.
- isolated means that the material is removed from its original environment (e.g., the natural environment, if it is naturally occurring).
- a naturally-occurring polynucleotide or polypeptide present in a living animal is not isolated, but the same polynucleotide or polypeptide, separated from some or all of the coexisting materials in the natural system, is isolated.
- Such polynucleotides could be part of a vector and/or such polynucleotides or polypeptides could be part of a composition, and still be isolated in that such vector or composition is not part of its natural environment.
- nucleic acids and polypeptide expression products disclosed according to the present invention may be in "enriched form".
- enriched means that the concentration of the material is at least about 2, 5, 10, 100, or 1000 times its natural concentration (for example), advantageously 0.01%, by weight, preferably at least about 0.1% by weight. Enriched preparations of about 0.5%, 1%, 5%, 10%, and 20% by weight are also contemplated.
- sequences, constructs, vectors, clones, and other materials comprising the present invention can advantageously be in enriched or isolated form.
- portion when used in relation to polypeptides, refer to a continuous sequence of residues, such as amino acid residues, which sequence forms a subset of a larger sequence.
- residues such as amino acid residues
- oligopeptides resulting from such treatment would represent portions, segments or fragments of the starting polypeptide.
- these terms refer to the products produced by treatment of said polynucleotides with any of the endonucleases.
- the Compared Sequence has the specified minimum percent identity to the Reference Sequence even though alignments may exist in which the herein above calculated percent identity is less than the specified percent identity.
- the inventors mean that the side chains of, for example, one or two of the amino acid residues are altered (for example by replacing them with the side chain of another naturally occurring amino acid residue or some other side chain) such that the peptide is still able to bind to an HLA molecule in substantially the same way as a peptide consisting of the given amino acid sequence in consisting of SEQ ID NO: 1 to SEQ ID NO: 288.
- variants of the peptides disclosed herein retain the ability to bind to the TCR of activated T cells, which can subsequently cross-react with and kill cells that express a polypeptide containing the natural amino acid sequence of the cognate peptide as defined in the present disclosure.
- Conservative substitutions are herein defined as exchanges within one of the following five groups: Group 1-small aliphatic, nonpolar or slightly polar residues (Ala, Ser, Thr, Pro, Gly); Group 2-polar, negatively charged residues and their amides (Asp, Asn, Glu, Gin); Group 3-polar, positively charged residues (His, Arg, Lys); Group 4-large, aliphatic, nonpolar residues (Met, Leu, Ile, Val, Cys); and Group 5-large, aromatic residues (Phe, Tyr, Trp).
- substitutions may involve structures other than the common L-amino acids.
- D-amino acids might be substituted for the L-amino acids commonly found in the antigenic peptides of the invention and yet still be encompassed by the disclosure herein.
- non-standard amino acids i.e., other than the common naturally occurring proteinogenic amino acids
- substitutions at more than one position are found to result in a peptide with substantially equivalent or greater antigenic activity as defined below, then combinations of those substitutions will be tested to determine if the combined substitutions result in additive or synergistic effects on the antigenicity of the peptide. At most, no more than four positions within the peptide would be simultaneously substituted.
- one or two amino acids can be exchanged with their conservative exchange partners (see herein below) without that the ability to bind to a molecule of the human major histocompatibility complex (MHC) class-I or -II is substantially changed, or is negatively affected, when compared to the non-modified peptide.
- MHC human major histocompatibility complex
- the amino acids for the elongation/extension can be the peptides of the original sequence of the protein or any other amino acid(s).
- the elongation can be used to enhance the stability or solubility of the peptides.
- the present disclosure provides peptides and variants of MHC class I epitopes, wherein the peptide or variant has an overall length of between 8 and 100, preferably between 8 and 30, and most preferred between 8 and 14, namely 8, 9, 10, 11, 12, 13, 14 amino acids, in case of the elongated class II binding peptides the length can also be 15, 16, 17, 18, 19, 20, 21 or 22 amino acids.
- the peptide or variant according to the present invention will have the ability to bind to a molecule of the human major histocompatibility complex (MHC) class I or II. Binding of a peptide or a variant to a MHC complex may be tested by methods known in the art.
- MHC human major histocompatibility complex
- Consisting essentially of shall mean that a peptide, in addition to the sequence according to any of SEQ ID NO: 1 to SEQ ID NO 288 or a variant thereof contains additional N- and/or C-terminally located stretches of amino acids that are not necessarily forming part of the peptide that functions as an epitope for MHC molecules epitope.
- the peptide is part of a fusion protein which comprises, for example, the 80 N-terminal amino acids of the HLA-DR antigen-associated invariant chain (p33, in the following "li") as derived from the NCBI, GenBank Accession number X00497.
- the peptides disclosed herein can be fused to an antibody as described herein, or a functional part thereof, in particular into a sequence of an antibody, so as to be specifically targeted by said antibody, or, for example, to or into an antibody that is specific for dendritic cells as described herein.
- the peptide of the invention may be synthesized to alter its steric configuration.
- the D-isomer of one or more of the amino acid residues of the peptide may be used, rather than the usual L-isomer.
- at least one of the amino acid residues of the peptides disclosed herein may be substituted by one of the well-known non-naturally occurring amino acid residues. Alterations such as these may serve to increase the stability, bioavailability and/or binding action of the peptides.
- modification of e.g. arginyl residues in proteins is often based on the reaction of vicinal dicarbonyl compounds such as phenylglyoxal, 2,3-butanedione, and 1,2-cyclohexanedione to form an adduct.
- vicinal dicarbonyl compounds such as phenylglyoxal, 2,3-butanedione, and 1,2-cyclohexanedione to form an adduct.
- Another example is the reaction of methylglyoxal with arginine residues.
- Cysteine can be modified without concomitant modification of other nucleophilic sites such as lysine and histidine.
- a large number of reagents are available for the modification of cysteine.
- the websites of companies such as Sigma-Aldrich (http://www.sigma-aldrich.com) provide information on specific reagents.
- Disulfide bonds can be formed and oxidized during the heat treatment of biopharmaceuticals.
- Woodward's Reagent K may be used to modify specific glutamic acid residues.
- N-(3-(dimethylamino)propyl)-N'-ethylcarbodiimide can be used to form intra-molecular crosslinks between a lysine residue and a glutamic acid residue.
- diethylpyrocarbonate is a reagent for the modification of histidyl residues in proteins.
- Histidine can also be modified using 4-hydroxy-2-nonenal.
- the reaction of lysine residues and other ⁇ -amino groups is, for example, useful in binding of peptides to surfaces or the cross-linking of proteins/peptides.
- Lysine is the site of attachment of poly(ethylene)glycol and the major site of modification in the glycosylation of proteins.
- Methionine residues in proteins can be modified with e.g. iodoacetamide, bromoethylamine, and chloramine T.
- Purification may be performed by any one, or a combination of, techniques such as recrystallization, size exclusion chromatography, ion-exchange chromatography, hydrophobic interaction chromatography and (usually) reverse-phase high performance liquid chromatography using e.g. acetonitrile/water gradient separation.
- techniques such as recrystallization, size exclusion chromatography, ion-exchange chromatography, hydrophobic interaction chromatography and (usually) reverse-phase high performance liquid chromatography using e.g. acetonitrile/water gradient separation.
- tumor tissue in relation to this invention shall mean a sample from a patient suffering from HCC, CRC, GB, GC, esophageal cancer, NSCLC, PC, RCC, BPH/PCA, OC, MCC, melanoma, breast cancer, SCLC, NHL, AML, GBC, CCC, UBC, UEC, or CLL, but not on normal tissues (see Example 1).
- a desirable method of modifying the DNA encoding the polypeptide of the invention employs the polymerase chain reaction as disclosed by Saiki RK, et al. (Saiki et al., 1988).This method may be used for introducing the DNA into a suitable vector, for example by engineering in suitable restriction sites, or it may be used to modify the DNA in other useful ways as is known in the art. If viral vectors are used, pox- or adenovirus vectors are preferred.
- DNA (or in the case of retroviral vectors, RNA) encoding the polypeptide constituting the compound of the invention may be joined to a wide variety of other DNA sequences for introduction into an appropriate host.
- the companion DNA will depend upon the nature of the host, the manner of the introduction of the DNA into the host, and whether episomal maintenance or integration is desired.
- a typical mammalian cell vector plasmid for constitutive expression comprises the CMV or SV40 promoter with a suitable poly A tail and a resistance marker, such as neomycin.
- a suitable poly A tail and a resistance marker, such as neomycin.
- pSVL available from Pharmacia, Piscataway, NJ, USA.
- An example of an inducible mammalian expression vector is pMSG, also available from Pharmacia.
- Useful yeast plasmid vectors are pRS403-406 and pRS413-416 and are generally available from Stratagene Cloning Systems, La Jolla, CA 92037, USA.
- Vectors containing the pre-pro-trypsin leader (PPT) sequence can direct the secretion of FLAG fusion proteins into the culture medium for purification using ANTI-FLAG antibodies, resins, and plates.
- Other vectors and expression systems are well known in the art for use with a variety of host cells.
- Preferred eukaryotic host cells include yeast, insect and mammalian cells, preferably vertebrate cells such as those from a mouse, rat, monkey or human fibroblastic and colon cell lines.
- Yeast host cells include YPH499, YPH500 and YPH501, which are generally available from Stratagene Cloning Systems, La Jolla, CA 92037, USA.
- Preferred mammalian host cells include Chinese hamster ovary (CHO) cells available from the ATCC as CCL61, NIH Swiss mouse embryo cells NIH/3T3 available from the ATCC as CRL 1658, monkey kidney-derived COS-1 cells available from the ATCC as CRL 1650 and 293 cells which are human embryonic kidney cells.
- Preferred insect cells are Sf9 cells which can be transfected with baculovirus expression vectors.
- An overview regarding the choice of suitable host cells for expression can be found in, for example, the textbook of Paulina Balbás and Argelia Lorence "Methods in Molecular Biology Recombinant Gene Expression, Reviews and Protocols," Part One, Second Edition, ISBN 978-1-58829-262-9 , and other literature known to the person of skill.
- the host cell is an antigen presenting cell, in particular a dendritic cell or antigen presenting cell.
- APCs loaded with a recombinant fusion protein containing prostatic acid phosphatase (PAP) were approved by the U.S. Food and Drug Administration (FDA) on April 29, 2010, to treat asymptomatic or minimally symptomatic metastatic HRPC (Sipuleucel-T) (Rini et al., 2006; Small et al., 2006).
- a further aspect of the invention provides a method of producing the peptide of the invention, the method comprising culturing a host cell and isolating the peptide from the host cell or its culture medium.
- the peptide, the nucleic acid or the expression vector of the invention are used in medicine.
- the peptide or its variant may be prepared for intravenous (i.v.) injection, sub-cutaneous (s.c.) injection, intradermal (i.d.) injection, intraperitoneal (i.p.) injection, intramuscular (i.m.) injection.
- Preferred methods of peptide injection include s.c., i.d., i.p., i.m., and i.v.
- Preferred methods of DNA injection include i.d., i.m., s.c., i.p. and i.v.
- peptide or DNA between 50 ⁇ g and 1.5 mg, preferably 125 ⁇ g to 500 ⁇ g, of peptide or DNA may be given and will depend on the respective peptide or DNA. Dosages of this range were successfully used in previous trials (Walter et al., 2012).
- the polynucleotide used for active vaccination may be substantially pure, or contained in a suitable vector or delivery system.
- the nucleic acid may be DNA, cDNA, PNA, RNA or a combination thereof. Methods for designing and introducing such a nucleic acid are well known in the art. An overview is provided by e.g. Teufel et al. (Teufel et al., 2005). Polynucleotide vaccines are easy to prepare, but the mode of action of these vectors in inducing an immune response is not fully understood.
- Suitable vectors and delivery systems include viral DNA and/or RNA, such as systems based on adenovirus, vaccinia virus, retroviruses, herpes virus, adeno-associated virus or hybrids containing elements of more than one virus.
- Non-viral delivery systems include cationic lipids and cationic polymers and are well known in the art of DNA delivery. Physical delivery, such as via a "gene-gun" may also be used.
- the peptide or peptides encoded by the nucleic acid may be a fusion protein, for example with an epitope that stimulates T cells for the respective opposite CDR as noted above.
- Suitable adjuvants include, but are not limited to, 1018 ISS, aluminum salts, AMPLIVAX ® , AS15, BCG, CP-870,893, CpG7909, CyaA, dSLlM, flagellin or TLR5 ligands derived from flagellin, FLT3 ligand, GM-CSF, IC30, IC31, Imiquimod (ALDARA ® ), resiquimod, ImuFact IMP321, Interleukins as IL-2, IL-13, IL-21, Interferon-alpha or -beta, or pegylated derivatives thereof, IS Patch, ISS, ISCOMATRIX, ISCOMs, Juvlmmune ® , LipoVac, MALP2, MF59, monophosphoryl lipid A, Montanide IMS 1312, Montanide ISA 206, Montanide ISA 50V, Montanide ISA-51, water-in-oil and oil-in-water
- CpG immunostimulatory oligonucleotides have also been reported to enhance the effects of adjuvants in a vaccine setting.
- CpG oligonucleotides act by activating the innate (non-adaptive) immune system via Toll-like receptors (TLR), mainly TLR9.
- TLR Toll-like receptors
- CpG triggered TLR9 activation enhances antigen-specific humoral and cellular responses to a wide variety of antigens, including peptide or protein antigens, live or killed viruses, dendritic cell vaccines, autologous cellular vaccines and polysaccharide conjugates in both prophylactic and therapeutic vaccines.
- TH1 bias induced by TLR9 stimulation is maintained even in the presence of vaccine adjuvants such as alum or incomplete Freund's adjuvant (IFA) that normally promote a TH2 bias.
- vaccine adjuvants such as alum or incomplete Freund's adjuvant (IFA) that normally promote a TH2 bias.
- CpG oligonucleotides show even greater adjuvant activity when formulated or co-administered with other adjuvants or in formulations such as microparticles, nanoparticles, lipid emulsions or similar formulations, which are especially necessary for inducing a strong response when the antigen is relatively weak.
- a CpG TLR9 antagonist is dSLlM (double Stem Loop Immunomodulator) by Mologen (Berlin, Germany) which is a preferred component of the pharmaceutical composition of the present invention.
- TLR binding molecules such as RNA binding TLR 7, TLR 8 and/or TLR 9 may also be used.
- CpGs e.g. CpR, Idera
- dsRNA analogues such as Poly(I:C) and derivates thereof
- AmpliGen ® Hiltonol ®
- poly-(ICLC) poly(IC-R)
- poly(I:C12U) non-CpG bacterial DNA or RNA
- immunoactive small molecules and antibodies such as cyclophosphamide, sunitinib, Bevacizumab ® , celebrex, NCX-4016, sildenafil, tadalafil, vardenafil, sorafenib, temozolomide, temsirolimus, XL-999, CP-547632, pazopanib, VEGF Trap, ZD2171, AZD2171, anti-CTLA4, other antibodies targeting key structures of the immune system (e.g.
- anti-CD40, anti-TGFbeta, anti-TNFalpha receptor) and SC58175, which may act therapeutically and/or as an adjuvant may act therapeutically and/or as an adjuvant.
- concentrations of adjuvants and additives useful in the context of the present invention can readily be determined by the skilled artisan without undue experimentation.
- Preferred adjuvants are anti-CD40, imiquimod, resiquimod, GM-CSF, cyclophosphamide, sunitinib, bevacizumab, interferon-alpha, CpG oligonucleotides and derivates, poly-(I:C) and derivates, RNA, sildenafil, and particulate formulations with PLG or virosomes.
- the adjuvant is selected from the group consisting of colony-stimulating factors, such as Granulocyte Macrophage Colony Stimulating Factor (GM-CSF, sargramostim), cyclophosphamide, imiquimod, resiquimod, and interferon-alpha.
- colony-stimulating factors such as Granulocyte Macrophage Colony Stimulating Factor (GM-CSF, sargramostim), cyclophosphamide, imiquimod, resiquimod, and interferon-alpha.
- the adjuvant is selected from the group consisting of colony-stimulating factors, such as Granulocyte Macrophage Colony Stimulating Factor (GM-CSF, sargramostim), cyclophosphamide, imiquimod and resiquimod.
- the adjuvant is cyclophosphamide, imiquimod or resiquimod.
- Even more preferred adjuvants are Montanide IMS 1312, Montanide ISA 206, Montanide ISA 50V, Montanide ISA-51, poly-ICLC (Hiltonol ® ) and anti-CD40 mAB, or combinations thereof.
- composition is used for parenteral administration, such as subcutaneous, intradermal, intramuscular or oral administration.
- parenteral administration such as subcutaneous, intradermal, intramuscular or oral administration.
- the peptides and optionally other molecules are dissolved or suspended in a pharmaceutically acceptable, preferably aqueous carrier.
- the composition can contain excipients, such as buffers, binding agents, blasting agents, diluents, flavors, lubricants, etc.
- the peptides can also be administered together with immune stimulating substances, such as cytokines.
- An extensive listing of excipients that can be used in such a composition can be, for example, taken from A. Kibbe, Handbook of Pharmaceutical Excipients (Kibbe, 2000 ).
- the composition can be used for a prevention, prophylaxis and/or therapy of adenomatous or cancerous diseases. Exemplary formulations can be found in, for example, EP2112253 .
- the immune response triggered by the vaccine according to the invention attacks the cancer in different cell-stages and different stages of development. Furthermore different cancer associated signaling pathways are attacked. This is an advantage over vaccines that address only one or few targets, which may cause the tumor to easily adapt to the attack (tumor escape). Furthermore, not all individual tumors express the same pattern of antigens. Therefore, a combination of several tumor-associated peptides ensures that every single tumor bears at least some of the targets.
- the composition is designed in such a way that each tumor is expected to express several of the antigens and cover several independent pathways necessary for tumor growth and maintenance. Thus, the vaccine can easily be used "off-the-shelf" for a larger patient population.
- a scaffold refers to a molecule that specifically binds to an (e.g. antigenic) determinant.
- a scaffold is able to direct the entity to which it is attached (e.g. a (second) antigen binding moiety) to a target site, for example to a specific type of tumor cell or tumor stroma bearing the antigenic determinant (e.g. the complex of a peptide with MHC, according to the application at hand).
- a scaffold is able to activate signaling through its target antigen, for example a T cell receptor complex antigen.
- Each scaffold can comprise a labelling which provides that the bound scaffold can be detected by determining the presence or absence of a signal provided by the label.
- the scaffold can be labelled with a fluorescent dye or any other applicable cellular marker molecule.
- marker molecules are well known in the art.
- a fluorescence-labelling for example provided by a fluorescence dye, can provide a visualization of the bound aptamer by fluorescence or laser scanning microscopy or flow cytometry.
- the present disclosure further relates to aptamers.
- Aptamers (see for example WO 2014/191359 and the literature as cited therein) are short single-stranded nucleic acid molecules, which can fold into defined three-dimensional structures and recognize specific target structures. They have appeared to be suitable alternatives for developing targeted therapies. Aptamers have been shown to selectively bind to a variety of complex targets with high affinity and specificity.
- DNA aptamers can be selected to reveal broad-spectrum recognition properties for various cancer cells, and particularly those derived from solid tumors, while non-tumorigenic and primary healthy cells are not recognized. If the identified aptamers recognize not only a specific tumor sub-type but rather interact with a series of tumors, this renders the aptamers applicable as so-called broad-spectrum diagnostics and therapeutics.
- Aptamers can be selected against complex targets such as cells and tissues and complexes of the peptides comprising, preferably consisting of, a sequence according to any of SEQ ID NO 1 to SEQ ID NO 288, at hand with the MHC molecule, using the cell-SELEX (Systematic Evolution of Ligands by Exponential enrichment) technique.
- complex targets such as cells and tissues and complexes of the peptides comprising, preferably consisting of, a sequence according to any of SEQ ID NO 1 to SEQ ID NO 288, at hand with the MHC molecule, using the cell-SELEX (Systematic Evolution of Ligands by Exponential enrichment) technique.
- the peptide of the present invention can be used to generate and develop specific antibodies against MHC/peptide complexes. These can be used for therapy, targeting toxins or radioactive substances to the diseased tissue. Another use of these antibodies can be targeting radionuclides to the diseased tissue for imaging purposes such as PET. This use can help to detect small metastases or to determine the size and precise localization of diseased tissues.
- MHC human major histocompatibility complex
- the antibody is binding with a binding affinity of below 20 nanomolar, preferably of below 10 nanomolar, to the complex, which is also regarded as "specific" in the context of the present invention.
- the present invention further relates to the peptide according to the invention that has the ability to bind to a molecule of the human major histocompatibility complex (MHC) class-I.
- MHC human major histocompatibility complex
- the present invention further relates to the peptide according to the invention wherein the peptide consists of an amino acid sequence according to SEQ ID NO: 14.
- the present invention further relates to an expression vector capable of expressing a nucleic acid according to the present invention.
- the present invention further relates to a host cell comprising the nucleic acid according to the invention or an expression vector according to the invention.
- the present invention further relates to the host cell according to the present invention that is an antigen presenting cell, and preferably a dendritic cell.
- the present invention further relates to the method according to the invention, wherein the antigen-presenting cell comprises an expression vector capable of expressing said peptide containing SEQ ID NO: 14.
- the present invention further relates to activated T cells, produced by the method according to the present invention, wherein said T cells selectively recognizes a cell which aberrantly expresses a polypeptide comprising an amino acid sequence according to the present invention.
- Also disclosed herein is a method of killing target cells in a patient which target cells aberrantly express a polypeptide comprising any amino acid sequence according to the present invention, the method comprising administering to the patient an effective number of T cells as according to the present invention.
- the present invention further relates to the peptide of the present invention, the nucleic acid according to the present invention, the expression vector according to the present invention, the host cell according to the present invention, or the activated cytotoxic T lymphocyte according to the present invention for use in medicine.
- the peptide for use of the present invention regards the use as a medicament or the use in the manufacture of a medicament.
- the present invention further relates to the peptide of the present invention for use according to the present invention, wherein the medicament is active against cancer.
- the present invention further relates to particular marker proteins and biomarkers based on the peptide according to the present invention, herein called "targets" that can be used in the diagnosis and/or prognosis of HCC, CRC, GB, GC, esophageal cancer, NSCLC, PC, RCC, BPH/PCA, OC, MCC, melanoma, breast cancer, SCLC, NHL, AML, GBC, CCC, UBC, UEC, or CLL.
- targets that can be used in the diagnosis and/or prognosis of HCC, CRC, GB, GC, esophageal cancer, NSCLC, PC, RCC, BPH/PCA, OC, MCC, melanoma, breast cancer, SCLC, NHL, AML, GBC, CCC, UBC, UEC, or CLL.
- a cDNA encoding a peptide according to the present invention can be expressed in prokaryotic cells (e.g., bacteria) or eukaryotic cells (e.g., yeast, insect, or mammalian cells), after which the recombinant protein can be purified and used to generate a monoclonal or polyclonal antibody preparation that specifically bind the HCC, CRC, GB, GC, esophageal cancer, NSCLC, PC, RCC, BPH/PCA, OC, MCC, melanoma, breast cancer, SCLC, NHL, AML, GBC, CCC, UBC, UEC, or CLL marker polypeptide used to generate the antibody according to the invention.
- prokaryotic cells e.g., bacteria
- eukaryotic cells e.g., yeast, insect, or mammalian cells
- the recombinant protein can be purified and used to generate a monoclonal or polyclonal antibody preparation that specifically bind the
- the antibodies or TCRs may also be used for in vivo diagnostic assays.
- the antibody is labeled with a radionucleotide (such as 111 In, 99 Tc, 14 C, 131 I, 3 H, 32 P or 35 S) so that the tumor can be localized using immunoscintiography.
- a radionucleotide such as 111 In, 99 Tc, 14 C, 131 I, 3 H, 32 P or 35 S
- antibodies or fragments thereof bind to the extracellular domains of two or more targets of a protein selected from the group consisting of the above-mentioned proteins, and the affinity value (Kd) is less than 1 ⁇ 10 ⁇ M.
- Activated T cells which are produced by the above method, will selectively recognize a cell that aberrantly expresses a polypeptide that comprises an amino acid sequence of SEQ ID NO: 1 to SEQ ID NO 288.
- the container of a therapeutic kit may be a vial, test tube, flask, bottle, syringe, or any other means of enclosing a solid or liquid.
- the kit will contain a second vial or other container, which allows for separate dosing.
- the kit may also contain another container for a pharmaceutically acceptable liquid.
- a therapeutic kit will contain an apparatus (e.g., one or more needles, syringes, eye droppers, pipette, etc.), which enables administration of the agents of the invention that are components of the present kit.
- the medicament of the invention is preferably used to treat HCC, CRC, GB, GC, esophageal cancer, NSCLC, PC, RCC, BPH/PCA, OC, MCC, melanoma, breast cancer, SCLC, NHL, AML, GBC, CCC, UBC, UEC, and CLL.
- a "personalized pharmaceutical” shall mean specifically tailored therapies for one individual patient that will only be used for therapy in such individual patient, including actively personalized cancer vaccines and adoptive cellular therapies using autologous patient tissue.
- the warehouse in the form of a database) is composed of tumor-associated peptides which were highly overexpressed in the tumor tissue of HCC, CRC, GB, GC, esophageal cancer, NSCLC, PC, RCC, BPH/PCA, OC, MCC, melanoma, breast cancer, SCLC, NHL, AML, GBC, CCC, UBC, UEC, or CLL patients with various HLA-A HLA-B and HLA-C alleles. It may contain MHC class I and MHC class II peptides or elongated MHC class I peptides. In addition to the tumor associated peptides collected from several tumor tissues, the warehouse may contain HLA-A*02 and HLA-A*24 marker peptides.
- This method is preferred for rare cancers and patients with a rare expression profile.
- the warehouse allows a significantly higher matching of the actual expression of antigens in the tumor with the vaccine.
- Selected single or combinations of several "off-the-shelf" peptides will be used for each patient in a multitarget approach.
- an approach based on selection of e.g. 5 different antigenic peptides from a library of 50 would already lead to approximately 17 million possible drug product (DP) compositions.
- DP drug product
- the peptides are selected for inclusion in the vaccine based on their suitability for the individual patient based on the method as described herein, or as below.
- the HLA phenotype, transcriptomic and peptidomic data is gathered from the patient's tumor material, and blood samples to identify the most suitable peptides for each patient containing "warehouse” and patient-unique (i.e. mutated) TUMAPs. Those peptides will be chosen, which are selectively or over-expressed in the patients tumor and, where possible, show strong in vitro immunogenicity if tested with the patients' individual PBMCs.
- the peptides included in the vaccine are identified by a method comprising: (a) identifying tumor-associated peptides (TUMAPs) presented by a tumor sample from the individual patient; (b) comparing the peptides identified in (a) with a warehouse (database) of peptides as described above; and (c) selecting at least one peptide from the warehouse (database) that correlates with a tumor-associated peptide identified in the patient.
- TUMAPs tumor-associated peptides
- the TUMAPs presented by the tumor sample are identified by: (a1) comparing expression data from the tumor sample to expression data from a sample of normal tissue corresponding to the tissue type of the tumor sample to identify proteins that are over-expressed or aberrantly expressed in the tumor sample; and (a2) correlating the expression data with sequences of MHC ligands bound to MHC class I and/or class II molecules in the tumor sample to identify MHC ligands derived from proteins over-expressed or aberrantly expressed by the tumor.
- the sequences of MHC ligands are identified by eluting bound peptides from MHC molecules isolated from the tumor sample, and sequencing the eluted ligands.
- the tumor sample and the normal tissue are obtained from the same patient.
- TUMAPs may be identified in the patient de novo , and then included in the vaccine.
- candidate TUMAPs may be identified in the patient by (a1) comparing expression data from the tumor sample to expression data from a sample of normal tissue corresponding to the tissue type of the tumor sample to identify proteins that are over-expressed or aberrantly expressed in the tumor sample; and (a2) correlating the expression data with sequences of MHC ligands bound to MHC class I and/or class II molecules in the tumor sample to identify MHC ligands derived from proteins over-expressed or aberrantly expressed by the tumor.
- proteins may be identified containing mutations that are unique to the tumor sample relative to normal corresponding tissue from the individual patient, and TUMAPs can be identified that specifically target the mutation.
- the genome of the tumor and of corresponding normal tissue can be sequenced by whole genome sequencing: For discovery of non-synonymous mutations in the protein-coding regions of genes, genomic DNA and RNA are extracted from tumor tissues and normal non-mutated genomic germline DNA is extracted from peripheral blood mononuclear cells (PBMCs). The applied NGS approach is confined to the re-sequencing of protein coding regions (exome re-sequencing). For this purpose, exonic DNA from human samples is captured using vendor-supplied target enrichment kits, followed by sequencing with e.g.
- tumor mRNA is sequenced for direct quantification of gene expression and validation that mutated genes are expressed in the patients' tumors.
- the resultant millions of sequence reads are processed through software algorithms.
- the output list contains mutations and gene expression. Tumor-specific somatic mutations are determined by comparison with the PBMC-derived germline variations and prioritized.
- the de novo identified peptides can then be tested for immunogenicity as described above for the warehouse, and candidate TUMAPs possessing suitable immunogenicity are selected for inclusion in the vaccine.
- the peptides included in the vaccine are identified by: (a) identifying tumor-associated peptides (TUMAPs) presented by a tumor sample from the individual patient by the method as described above; (b) comparing the peptides identified in a) with a warehouse of peptides that have been prescreened for immunogenicity and overpresentation in tumors as compared to corresponding normal tissue; (c) selecting at least one peptide from the warehouse that correlates with a tumor-associated peptide identified in the patient; and (d) optionally, selecting at least one peptide identified de novo in (a) confirming its immunogenicity.
- TUMAPs tumor-associated peptides
- the vaccine preferably is a liquid formulation consisting of the individual peptides dissolved in between 20-40% DMSO, preferably about 30-35% DMSO, such as about 33% DMSO.
- the peptide of the present invention is also useful in diagnostics. Since the peptides were generated from HCC, CRC, GB, GC, esophageal cancer, NSCLC, PC, RCC, BPH/PCA, OC, MCC, melanoma, breast cancer, SCLC, NHL, AML, GBC, CCC, UBC, UEC, and CLL cells and since it was determined that these peptides are not or at lower levels present in normal tissues, these peptides can be used to diagnose the presence of a cancer.
- the peptide of the present invention might be used to analyze lymphocyte responses against those peptides such as T cell responses or antibody responses against the peptide or the peptide complexed to MHC molecules. These lymphocyte responses can be used as prognostic markers for decision on further therapy steps. These responses can also be used as surrogate response markers in immunotherapy approaches aiming to induce lymphocyte responses by different means, e.g. vaccination of protein, nucleic acids, autologous materials, adoptive transfer of lymphocytes. In gene therapy settings, lymphocyte responses against peptides can be considered in the assessment of side effects. Monitoring of lymphocyte responses might also be a valuable tool for follow-up examinations of transplantation therapies, e.g. for the detection of graft versus host and host versus graft diseases.
- HLA peptide pools as obtained were separated according to their hydrophobicity by reversed-phase chromatography (nanoAcquity UPLC system, Waters) and the eluting peptides were analyzed in LTQ-velos and fusion hybrid mass spectrometers (ThermoElectron) equipped with an ESI source.
- Peptide pools were loaded directly onto the analytical fused-silica micro-capillary column (75 ⁇ m i.d. ⁇ 250 mm) packed with 1.7 ⁇ m C18 reversed-phase material (Waters) applying a flow rate of 400 nL per minute.
- the peptides were separated using a two-step 180 minute-binary gradient from 10% to 33% B at a flow rate of 300 nL per minute.
- the gradient was composed of Solvent A (0.1 % formic acid in water) and solvent B (0.1 % formic acid in acetonitrile).
- Solvent A 0.1 % formic acid in water
- solvent B 0.1 % formic acid in acetonitrile
- a gold coated glass capillary (PicoTip, New Objective) was used for introduction into the nanoESI source.
- the LTQ-Orbitrap mass spectrometers were operated in the data-dependent mode using a TOP5 strategy.
- each identified peptide can be associated with quantitative data allowing relative quantification between samples and tissues.
- all quantitative data acquired for peptide candidates was inspected manually to assure data consistency and to verify the accuracy of the automated analysis.
- a presentation profile was calculated showing the mean sample presentation as well as replicate variations.
- the profiles juxtapose cancer samples to a baseline of normal tissue samples.
- Presentation profiles of exemplary over-presented peptides are shown in Figure 1 .
- An overview of peptide presentation across entities is shown in Table 4 for selected peptides.
- Table 4 Overview of presentation of selected peptides across entities. A peptide was considered interesting in an entity if it was over-presented on cancer samples of this entity compared to normal tissues.
- MEL melanoma
- BRCA breast cancer
- OSCAR esophageal carcinoma.
- BPH includes benign prostate hyperplasia as well as pancreatic cancer.
- SEQ ID NO. Sequence Entities of particular interest 1 KLQEKIQEL GB,GC,NSCLC,HCC,OC,RCC,CRC,PC, OSCAR 2 SVLEKEIYSI NSCLC,HCC,BPH,OC,CRC,PC 3 RVIDDSLVVGV NSCLC,HCC,OC,MEL,CRC,PC, OSCAR 4 VLFGELPAL GB,NSCLC,BRCA,RCC,PC, OC, PC 5 GLVDIMVHL NSCLC,RCC, OC 7 ALLQALMEL GC,NSCLC,RCC,CRC,PC 8 ALSSSQAEV GB,NSCLC,OC,CRC,PC 9 SLITGQDLLSV NSCLC,BPH,OC,MEL,PC, OSCAR 10 QLIEKN
- GB glioblastoma
- BRCA breast cancer
- CRC colorectal cancer
- RCC renal cell carcinoma
- CLL chronic lymphocytic leukemia
- HCC hepatocellular carcinoma
- NSCLC non-small cell lung cancer
- SCLC small cell lung cancer
- NHL non-Hodgkin lymphoma
- AML acute myeloid leukemia
- OC ovarian cancer
- PC pancreatic cancer
- BPH prostate cancer and benign prostate hyperplasia
- OSCAR esophageal cancer, including cancer of the gastric-oesophageal junction
- GBC_CCC gallbladder adenocarcinoma and cholangiocarcinoma
- MEL melanoma
- GC gastric cancer
- UBC urinary bladder cancer
- UTC uterine cancer.
- RNA expression profiling adds an additional level of safety in selection of peptide targets for immunotherapies. Especially for therapeutic options with high safety risks, such as affinity-matured TCRs, the ideal target peptide will be derived from a protein that is unique to the tumor and not found on normal tissues.
- normal tissue expression of all source genes was shown to be minimal based on the above-described database of RNA expression data covering about 3000 normal tissue samples. Further RNA analyses of normal and tumor tissues were added in case of some cancer entities (HCC, CRC, GB, GC, NSCLC, PC, RCC, BPH/PCA) to estimate the target coverage in the population of patients having the respective cancer.
- RNA from healthy human tissues was obtained commercially (Ambion, Huntingdon, UK; Clontech, Heidelberg, Germany; Stratagene, Amsterdam, Netherlands; BioChain, Hayward, CA, USA). The RNA from several individuals (between 2 and 123 individuals) was mixed such that RNA from each individual was equally weighted. Quality and quantity of all RNA samples were assessed on an Agilent 2100 Bioanalyzer (Agilent, Waldbronn, Germany) using the RNA 6000 Pico LabChip Kit (Agilent).
- RNA from healthy human tissues for RNASeq experiments was obtained from: Asterand (Detroit, MI, USA & Royston, Herts, UK), BioCat GmbH (Heidelberg, Germany), BioServe (Beltsville, MD, USA), Capital BioScience Inc. (Rockville, MD, USA), Geneticist Inc. (Glendale, CA, USA), Istituto Nazionale Tumori "Pascale” (Naples, Italy), ProteoGenex Inc. (Culver City, CA, USA), University Hospital Heidelberg (Heidelberg, Germany)
- RNA from tumor tissues for RNASeq experiments was obtained from: Asterand (Detroit, Ml, USA & Royston, Herts, UK), Bio-Options Inc. (Brea, CA, USA), BioServe (Beltsville, MD, USA), Geneticist Inc. (Glendale, CA, USA), ProteoGenex Inc. (Culver City, CA, USA), Tissue Solutions Ltd (Glasgow, UK), University Hospital Bonn (Bonn, Germany), University Hospital Heidelberg (Heidelberg, Germany), University Hospital Tübingen (Tübingen, Germany)
- RNA expression profiles (Affymetrix microarrays) of 30 GB, 16 CRC, 56 RCC, 12 HCC, 38 NSCLC, 11 PC, 34 GC, and 20 prostate cancer samples.
- RNA expression analysis of all tumor and normal tissue RNA samples was performed by Affymetrix Human Genome (HG) U133A or HG-U133 Plus 2.0 oligonucleotide microarrays (Affymetrix, Santa Clara, CA, USA). All steps were carried out according to the Affymetrix manual. Briefly, double-stranded cDNA was synthesized from 5-8 ⁇ g of total RNA, using SuperScript RTII (Invitrogen) and the oligo-dT-T7 primer (MWG Biotech, Ebersberg, Germany) as described in the manual.
- HG Human Genome
- HG-U133 Plus 2.0 oligonucleotide microarrays Affymetrix, Santa Clara, CA, USA. All steps were carried out according to the Affymetrix manual. Briefly, double-stranded cDNA was synthesized from 5-8 ⁇ g of total RNA, using SuperScript RTII (Invitrogen) and the oligo-dT-T7 primer (MWG
- RNAseq next generation sequencing
- CeGaT CeGaT
- sequencing libraries are prepared using the Illumina HiSeq v4 reagent kit according to the provider's protocol (Illumina Inc., San Diego, CA, USA), which includes RNA fragmentation, cDNA conversion and addition of sequencing adaptors. Libraries derived from multiple samples are mixed equimolarly and sequenced on the Illumina HiSeq 2500 sequencer according to the manufacturer's instructions, generating 50 bp single end reads. Processed reads are mapped to the human genome (GRCh38) using the STAR software.
- Expression data are provided on transcript level as RPKM (Reads Per Kilobase per Million mapped reads, generated by the software Cufflinks) and on exon level (total reads, generated by the software Bedtools), based on annotations of the ensembl sequence database (Ensembl77). Exon reads are normalized for exon length and alignment size to obtain RPKM values.
- RPKM Reads Per Kilobase per Million mapped reads, generated by the software Cufflinks
- exon level total reads, generated by the software Bedtools
- Exon reads are normalized for exon length and alignment size to obtain RPKM values.
- Exemplary expression profiles of source genes that are highly over-expressed or exclusively expressed in NHL, BRCA, GBC, CCC, MEL, OC, OSCAR, SCLC, UBC, UEC are shown in Figure 2 F-H .
- Expression scores for further exemplary genes are shown in Table 5B.
- the inventors In order to perform in vitro stimulations by artificial antigen presenting cells loaded with peptide-MHC complex (pMHC) and anti-CD28 antibody, the inventors first isolated CD8+ T cells from fresh HLA-A*02 leukapheresis products via positive selection using CD8 microbeads (Miltenyi Biotec, Bergisch-Gladbach, Germany) of healthy donors obtained from the University clinics Mannheim, Germany, after informed consent.
- CD8 microbeads Miltenyi Biotec, Bergisch-Gladbach, Germany
- the purified co-stimulatory mouse IgG2a anti human CD28 Ab 9.3 (Jung et al., 1987) was chemically biotinylated using Sulfo-N-hydroxysuccinimidobiotin as recommended by the manufacturer (Perbio, Bonn, Germany). Beads used were 5.6 ⁇ m diameter streptavidin coated polystyrene particles (Bangs Laboratories, Illinois, USA).
- pMHC used for positive and negative control stimulations were A*0201/MLA-001 (peptide ELAGIGILTV (SEQ ID NO. 289) from modified Melan-A/MART-1) and A*0201/DDX5-001 (YLLPAIVHI from DDX5, SEQ ID NO. 290), respectively.
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- 2021-07-23 US US17/384,330 patent/US11407807B2/en active Active
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2022
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